Submission #765100

#	Time	Username	Problem	Language	Result	Execution time	Memory
765100		Sohsoh84	Wombats (IOI13_wombats)	C++17	55 / 100	20048 ms	262144 KiB

wombats

#include "wombats.h"
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll, ll> pll;

#define X		first
#define Y		second
#define sep		' '
#define debug(x)	cerr << #x << ": " << x << endl;

const ll MAXN = 5000 + 10;
const ll MAXM = 100 + 10;

int n, m, H[MAXN][MAXM], V[MAXN][MAXM], ps[MAXN][MAXM], sg[MAXN << 2][MAXM][MAXM], opt[MAXM][MAXM];

inline void update_ps(int i) {
	for (int j = 2; j <= m; j++)
		ps[i][j] = ps[i][j - 1] + H[i][j - 1];
}

inline void update_ans(int mid, int v) {
	for (int x = 1; x <= m; x++) {
		for (int y = 1; y <= m; y++) {
			sg[v][x][y] = sg[v << 1][x][x] + V[mid][x] + sg[v << 1 | 1][x][y];
			for (int f = 1; f <= m; f++) {
				sg[v][x][y] = min(sg[v][x][y], sg[v << 1][x][f] + V[mid][f] + sg[v << 1 | 1][f][y]);
			}
		}
	}
}

void build(int l = 1, int r = n, int v = 1) {
	if (l == r) {
		for (int i = 1; i <= m; i++)
			for (int j = 1; j <= m; j++)
				sg[v][i][j] = ps[l][max(i, j)] - ps[l][min(i, j)];
	} else {
		int mid = (l + r) >> 1;
		build(l, mid, v << 1);
		build(mid + 1, r, v << 1 | 1);
		update_ans(mid, v);
	}
}

void update(int ind, int l = 1, int r = n, int v = 1) {
	if (l == r) {
		for (int i = 1; i <= m; i++)
			for (int j = 1; j <= m; j++)
				sg[v][i][j] = ps[l][max(i, j)] - ps[l][min(i, j)];	
	} else {
		int mid = (l + r) >> 1;
		if (ind <= mid) update(ind, l, mid, v << 1);
		else update(ind, mid + 1, r, v << 1 | 1);
		
		update_ans(mid, v);
	}
}

void init(int R_, int C_, int H_[5000][200], int V_[5000][200]) {
	n = R_, m = C_;
	for (int i = 1; i <= n; i++)
		for (int j = 1; j < m; j++)
			H[i][j] = H_[i - 1][j - 1];
	
	for (int i = 1; i < n; i++)
		for (int j = 1; j <= m; j++)
			V[i][j] = V_[i - 1][j - 1];

	for (int i = 1; i <= n; i++)
		update_ps(i);
	
	build();
}

void changeH(int P, int Q, int W) {
	P++, Q++;
	H[P][Q] = W;
	update_ps(P);
	update(P);
}

void changeV(int P, int Q, int W) {
	P++, Q++;
	V[P][Q] = W;
	update(P);
}

int escape(int V1, int V2) {
	V1++, V2++;
	return sg[1][V1][V2];
}

// TODO: 1-base
// TODO: check fit in ll
// TODO: change max limits
// TODO: check n == 1
// TODO: check bounds(n / m)

Compilation message (stderr)

grader.c: In function 'int main()':
grader.c:15:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
   15 |  int res;
      |      ^~~

• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 16 / 16
• Subtask 4: 18 / 18
• Subtask 5: 0 / 21
• Subtask 6: 0 / 24